Centrifugal cream-separator.



J. & A. PERSOONS.

OBNTRIFUGAL OREAM SEPARATOR. APPLICATION nun mam, 1912.

1,080,997, Patented Dec. 9, 1913.

2 SHEETS-SHEET 2.

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Witnesses.- A Elven/Z5215.

Jittys ous lubrication-f the parts, and means for m we e we Jennierunscons Ann n'Lrnousn TO-dZZwiwm it mag concern;

Be ib lIIlOWIl that we, JULInN PERSOONS and \ALPIIONSE Pnnsoons,subjects of the King of Belgium, residing at Thildonck,

near Louvain, Belgium, have invented new and useful Improvements inCentrifugal Cream-Separators of which the following is a specification,

This invention relates to centrifugal cream separators of the typecomprising a freely suspended drum. 7

The obj an improved separator of exceptionally simple and inexpensiveconstruction particularly suitable forsmall outputs.

The main feature of the improved separator according to the presentinvention consists' inthat the drum body is formed of a single piece orseveral permanently connected parts in such mannerthat' it cannot beopened the liner placed-within the drum being capable ofcollapsing to areduced diameter in order to be introduced into the drum and ofsubsequently developing when in its normal working position. Owing tothis feature the improved separator has all the advantages of separatorsin which the drum can betaken to pieces-to allow of the removal orintroduction of the liner, while atthe same time the improved separatorretains the simplicityof beingin one piece.

'Other features-0f the present invention concern the method' ofdrivingthe SUSPGII.

sion shaftof the drum, the means of guiding the said shaft, means forinsuring continuavoiding'leakage from the collecting casing .vithoutrecourse to an elastic omt.

These features are hereinafter described. in detail andcla'imed;

One method of carrying out the present invention is illustrated in theaccompanying drawings in which: 1

Figure his a vertical section of the im proved cream separator. Fig. 2is a plan of the liner of the drum, shown in open or developed conditionwhich itassumes inside the drum. -Fig. 3 is a plan of theliner incollapsed condition, ready for insertion or withdrawal from the turbine.Fig. 1 is an elevational view of Fig. 8. 'Fig. 5 is a horizontalsection'on the line a. b of Fig. 1',-

55 Fig. '7 a verticalsection of a special key ect of the invention is toprovide rn'nsoons, or THILDONCK, NEAR Louvnm, BELGIUM.

GENTRIFUGAL 'CREAM-SEPARATOR.

for changing the condition of the liner at the time of its insertion orwithdrawal from the drum. a gulde dBVlCOfOI the suspension shaft of thedrum, oirthe line 0 d of F i 9. Fig. 9 is guide device on the line i asection of the same 6 f of Fig. 8. i

As shown in Fig. 1 the separator comprises as usual a frame 1 having abox 2 containing the driving mechanismfi, 4,5, 6

ofknown construction actuating a worm 7 formed or mounted on a hollowshaft 8 the lower end of which is supported by a ball footstep bearing 9while its upper end1rotates in a bush 10 carried by a member 11 JOiIlGdto the frame 1. Through thehollow I the hollowshaft 8. h This'spring 18,to acertain extent, grips the upper end 1 of the hollow shaftfiwhile itscoils are wound in the opposite direction relatively to that'in whichthe hollow shaft transmits the torque Under these conditions, the

to the nut-17. coils which already grip the shaft 8 tend to decrease indiameter and increase-their grip whenever any torque is transmitted tothe spring. On theother hand if rotation occurs in the oppositedirection or on the arising of-a resistance acting in the oppositedirection to the driving torque, the coils of the spring tend to openand uncouple .the

hollow shaft from the rod 12.

The rod 12 from which. the drum issus pended requires asusual to beguided below the ball bearing. The guiding means-employed in connectionwith the present inven-- tion consists of-four pins 19 pressing againstthe circumference of the spindle '12 and lodged in a cup member 20;these pins terminate near the outer periphery of the cap member 20 inconical surfaces 20" which are surrounded by four metal wires 21.wrapped about the cup member 20. The guide device. thus formed isattached by a bolt not i-llus Fig. 8 is a horizontal sectionof ISpecification of Letters Patent. I 'Pittenztetll Dec. 9., 15 913.Application filed February-21, 1912. Serial'No. 679,127. a I I trated,in the space 22 in the frame 2. It is readily understood that owing tothis arrangement the guide device has a progressively increasing action.The oscillations of the rod 12 are transmitted to the pins 19 which tendto be displaced horizontally in the grooves of the cup member 20 inwhich they are lodged. ()wlng to the conical form of the externalsurface 20 of the pins 19, these latter begin to act on the lowest wire21 and according as the amplitude of the swings of the spindle 12increases, the surfaces 20 successively act on two, three, or fourwires, so that the resistance to the swings of the spindle 12appreciably increases with the amplitude of the said swings.

In the lower part of the space 22 is screwed a metal plug piece 23 forinsuring tightness at this part of the frame owing to 'the provision ofan elastic joint 24. The

lubricant is thus prevented from attaining the collecting casing 26. Thespace 22 communicates through a hole 25 with the box 2 of the frame soas to return thereto the lubricant which collects in the space 22 owingto the movement of themechanism. This arrangement insures perfect andcontinuous lubrication owing to the constant oil circulation during theoperation of the separator.

Within the casing 26 which will be afterward more fully described, islocated the drum proper 13 which has the following features: The drum isformed of two pieces, preferably beaten or stamped out, these piecesbeing permanently connected to each other. It is united to an upper late35 provided withan opening 36 for t e milk supply. Through this openingpasses the lower end of the spindle 12 which is hooked to a ring or book37 attached to a central hub 38 to which is screwed or otherwiseattached the drum body. As this drum body is not adapted to be openedfor the introduction of the liner 14, this lat-ter is made of'specialconstruction so as to be capable of insertion through the lower opening15 of the false bottom lodged in the lower opening 39 of the drum body.The liner 14 is shown separately in. Figs. 2, 3 and 4 and comprises acertain number of blades 40 each fixed to a vertical rod 41. These rodsare held by a ring 42 lodged in an opening 43 provided in the centralpart of the blades. These latter are formed with recesses 44 and 45 soas to conform to the internal shape of the drum and to enable pins 33carried by a special key 32 to be introduced between the blades for apurpose to be subsequently described. When the blades 40 of the linerare turned down on to one another the liner assumes the form shown in Fis. 3 and 4, its diameter being then less than the internal diameter ofthe opening 15 of the false bottom 16 so that the liner as a whole canbe introduced into the drum. Then by introducing the pins 33 g of thekey 32 between the blades 40 in the manner shown in Fig. 3, the bladescan be rotated so as to cause the liner to assume the open or developedcondition shown in Fig. 2, if at this instant the rods 41 are preventedfrom turning about the central member 38 supporting the drum. Thisresult is obtained by providing this central member 38 with a certainnumber of flutings 46 on its external surface, in which fiut-ings therods 41 lodge when the liner is put in place. On the other hand when theliner 14 is to be withdrawn from the turbine 13 it is only necessary toturn the key 32 in the'reverse direction so that the pins 33 insertedbetween the blades 40 turn these blades in toward the center to occupythe position shown in Fig. 3. The liner can then be inserted in andwithdrawn from the drum as required, for cleaning or other purposes,altlaough the drum cannot be taken apart and consists either of a singlepiece or of several pieces permanently connected to each other. Thefalse bottom 16 should obviously be introduced into the drum body incourse of construction. This false bottom can be easily cleaned sinceafter removal of the liner 14 it may be pushed to the top of the drum inorder to clean its lower surface and the lower conical surface of thedrum body; The upper surface of the false bottom may be cleaned byinserting the hand in the drum body through the opening 15.

The upper part of the drum body is provided with openings 47 for thepassage of the milk and the lower part is provided with openings 48through which the skimmed milk flows away. The cream collects in areceiver 31 and the skim milk in a receiver 30 these receivers beingformed in the collecting casing 29. This latter comprises an upper part26 integral with the frame 1 and a lower part 29 preferably of sheetmetal, simply attached y hooks to the upper part. The upper part isprovided with two edges 27 and 28 one ofwhich. 28 projects a certaindistance into the lower part 29 and is preferably given a certaininclination; under these conditions no leakage is possible between thetwo parts, while no joint is required.

The COI'iSlitlciiOIl hereinbefore described has the following importantadvantages over existing separators: It has the advantage over drumsmade of two or more parts of not experiencing'wear and tear, having noscrews or bolts and never'being taken to pieces; at the same time itsmanipulation is much simpler and easier requiring no jointto preventleaking and being always ready for use after cleaning. In addition tothese advantages it has a much higher efliciency proportional to itsbulk than drums in one piece without liner, and this without the oplsometres? eration of cleaning becoming troublesome, since the liner can beeasily removed from the drum when required, as has already beenexplained.

The device for driving the shaft has the advantage of great simplicitywhile at the same time it constitutes a clutch which is particularlyflexible and capable of running freely whenever the mechanism becomesjammed for any reason, thereby avoiding accidents.

The improved guide device has the ad vantage already pointed out ofprogressive action while at the same time it is extremely reliable;being located in the lubrication circuit it shares the, advantages ofcontinuous automatic lubrication.

'The frame 1 may be provided in the box 2 with a space 49 for collectingthe impurities contained in the oil or other lubricant; this enablesforeign matters contained in the lu- I bricant to be withdrawn from thecirculation, and prevents such matters from being constantly brought incontact with the movingiparts.

aving thus described our invention, what we claim is:

1. In a centrifugal cream separator, a hollow drum substantiallycircular in crosssection, said drum being provided with an openin ofless diameter-than the diameter of the rum, a collapsible liner adaptedfor insertion in and removal from, said drum through said opening in itscollapsed. position.

2. In a centrifugal cream separator, a hollow drum substantiallycircular in crosssection, having an opening therein of less diameterthan the diameter of the drum, a collapsible liner comprising aplurality of rotatably mounted blades adapted for insertion and removalthrough said opening in its collapsed position, and means for positivelyrotating the blades of said liner to their operating position when inthe drum.

3. In a centriiugal cream separator, a hollow drum substantiallycircular in crosssection having an opening therein of less diameter thanthe diameter of the drum, a collapsible liner adapted for insertion andremoval through said opening, said liner comprising a plurality ofrotatably mounted blades, means for preventing relative concentricrotation of the liner and drum, and means for positively rotating theblades to their operating position when the liner is in place in saiddrum.

In testimony whereof we have signed our names to this specificationinthe presence of two subscribing witnesses.

JULIEN PERSOONS. ALPHONSE PERSOONS.

copies of this patent may be'obtained for five cents each, by addressingthe Gommissionar of Patents,

7 Washington, D. C.

